Intratemporal facial nerve: annotated CT

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Axial non-contrast

CT scan of the temporal bone demonstrating bony canal of the intratemporal part of the facial nerve (red).

Case Discussion

The intratemporal part of the facial nerve has three segments: labyrinthine (from IAC to geniculate ganglion), tympanic (from geniculate ganglion to pyramidal eminence) and mastoid (from pyramidal eminence to stylomastoid foramen).